Stair-jack.



C. D. FAHRNEY.

STAIR JACK.

APPLICATION FILED JAN. 24, I919.

Patented Apr. 22, 1919.

came 1:. FAHRNEY, or CAMBRIDGE, MASSACHUSETTS.

STAIRJAGK.

Specification of Letters Patent.

Patented Apr. 22, 11919.

Application filed January 24, 1919. Serial N 0. 272,854.

To all whom it may concern:

Be it known that I,'(JALLo D. FAHRNEY, a citizen of the United States, residing at No. 26 Ellery street, in the city of Cambridge, in the county of Middlesex and State of Massachusetts, have invented a new and useful Stair-Jack, of which the following is a specification.

My invention consists of a simple device and has for its object to enable a person to move filled ash barrels or other heavy articles up an ordinary stairs with comparative ease.

Referring to the accompanying drawing, Figure 1 is a perspective showing the device in position on an ordinary stairs and an ash barrel being manipulated thereon by the operator. Fig. 2 is also a perspective view from a different positionwhile Fig. 3 illustrates how the apparatus constructed in the form here shown may be used for skidding purposes or for sliding empty barrels down stairs by means of employing a detachable bail.

Like letters refer to ferent views.

The device illustrated is of rigid construction and when in position on the stairs A forms a horizontal platform one end of which rests on and partly overlaps one of the steps the other end being sustained by the supports B and C shown in Fig. 2 and one of which is represented by B in Figs. 1 and 3, the said supports resting on a lower step. The two supports are connected at one side by the portion D which is so spaced that it acts as a jam to contact with .an inlike parts in the diftervenin step of the stairs and also provides a means for enabling the operator to hold the jack firmly in the proper position while the load is being manipulated thereon. When in the position shown in Fig. 3 D forms a platform which may be employed in starting the barrels up the stairs.

E, in Fig. 3 represents a detachable bail made with hooked ends to engage the holes F when it is desired to use the device for sledding purposes.

In using the device on the stairs the operator grasps the barrel at its top with his hands and bracin himself against the jack with his knee he tilts the barrel toward him and balancing it on its rim works it forward on the platform A by an alternating rolling movement until the elevated portion of the I'1II1 overlaps the next step above, when the barrel is tipped forward onto that step and worked ahead and held by the operator in the position indicated by the dotted outline while he reaches down with one hand and lifts the jack into a new position for a repetition of the operation.

In practice it is found that it is necessary for the operator to hold the jack in position against the stairs with his knee while tipping the barrel toward him on it to prevent the jack and all from toppling over on him and at the same time it makes the task easier for him by being able to get close up to the barrel. To prevent the tipping of the jack when the load is merely resting on it and to lessen the tendency to do so while the barrel is being tilted on it I provide the supporting points of the upright portion of the device as far out as possible on the step at the bottom, the point referred to being indicated by G in Fig. 1, the two supports B and O being shown cut at an angle for that purpose. In the form illustrated the twin supports B and C are arranged far enough apart to permit the knee of the operator to pass between them and engage the connecting portion D, the same being pressed against the intervening step at H, Fig 1.

Claims:

1. A stair jack so constructed that when in position on the stairs it forms a platform with one end adapted to rest on and partly overlap one of the steps, the other end being sustained by a support resting on a lower step and means for enabling the operator to hold the device firmly in position against the stairs with his knee while tilting and manipulating the load on the said platform.

2. A stair jack so constructed that when in position on the stairs it forms a horizon tal platform with one of its ends adapted to rest on and partly overlap one of the steps, the other end being provided with supports to rest on a lower step and means for enabling the operator to hold the contrivance firmly in position against the steps with his knee while tilting and manipulating the load on the said platform, the portion receiving the knee pressure being farther away from the operator than the contact point of the supports on the lower steps. v

3. A "stair" jack having a'liorizontalplatform With one of its ends adapted to rest on and partly overlap one of the steps, supports for the other end of the said platform resting on a, lower step and a, portion "to be pressed by the knee of the operator against an intervening step While manipulating the 10 load on the said platform.

' CALLO n. FAHRNEY.

Witnessesz I 7 JOHN BUOKLER, H. D. THAXTER.

Copies of thin patent may be obtained for five cents each, by addressing the Commissioner of Iwztents,

Washington, D. 0. a 

